I need a part....(or an idea)

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McCarthy, Patrick (GE Appliances, Non-GE)

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Jul 20, 2017, 10:14:32 AM7/20/17
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So, I need to switch an incoming line to 1 of 2 outputs… Easy, SPDT

But…

I have 10 incoming lines…. And they all need to move together

I found a big barrel style (5” deep!)that cost 120.00 each, Min order 10.

 

Does anyone have a better/cleaner/cheaper solution?

 

-Mixed inputs, some 5v, some 120v

-All outputs (20) are isolated from each other

-The switch needs to happen in 1 step, while under power (10 toggles != a good solution, even with a bar epoxied across all 10 (Yes, tried… Mechanically unsound…))

-Not fond of Breadboard solutions where I am, so “10 relays with a common switching signal” is a no-go[Unless you have something that has that all preinstalled on a card]

Ryan Ransford

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Jul 20, 2017, 10:23:02 AM7/20/17
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This is by no means my forte, but a quick google search for multi-relay shows that these sorts of things do exist.

http://www.instructables.com/id/Home-Automation-How-to-Add-Relays-to-Arduino/ -- This article shows an arduino-driven 8-relay board.

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David Ortiz-Grob

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Jul 20, 2017, 10:44:16 AM7/20/17
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Yeah, premade 10 channel relay board is probably your best option. barring that, I know you said 10 SPDT won't work but maybe 5 DPDTs will?

On Thu, Jul 20, 2017 at 10:22 AM, Ryan Ransford <rdra...@gmail.com> wrote:
This is by no means my forte, but a quick google search for multi-relay shows that these sorts of things do exist.

http://www.instructables.com/id/Home-Automation-How-to-Add-Relays-to-Arduino/ -- This article shows an arduino-driven 8-relay board.

Chris Hettinger

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Jul 20, 2017, 10:45:00 AM7/20/17
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Why not drive 10 SPDT relays off the same arduino pin (have to verify that arduino pin can source enough current for all 10 relay drivers). What kind of latency can be allowed?  The relays will not all "turn on" or "turn off" at the same time in this configuration because of mechanical/ electrical differences in the relay/  driver circuit, but the latency will be very low.

Here is a 16 relay board with integraed drivers:
It uses a ULN2803APG, which has a 2.7kohm resistor on each input.  Driving them with 5 volt logic (Arduino Uno) yields 1.851mA (1.85ma=5V/2700ohm).  The Arduino can source 40ma (https://playground.arduino.cc/Main/ArduinoPinCurrentLimitations) well below 10x1.851ma=18.52ma.

Chris


On Thu, Jul 20, 2017 at 10:22 AM, Ryan Ransford <rdra...@gmail.com> wrote:
This is by no means my forte, but a quick google search for multi-relay shows that these sorts of things do exist.

http://www.instructables.com/id/Home-Automation-How-to-Add-Relays-to-Arduino/ -- This article shows an arduino-driven 8-relay board.

Patrick Joyce

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Jul 20, 2017, 10:52:45 AM7/20/17
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David Ortiz-Grob

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Jul 20, 2017, 11:00:13 AM7/20/17
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Patrick Joyce

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Jul 20, 2017, 11:04:40 AM7/20/17
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It's not in stock and doesn't list a lead time, which doesn't bode well for an order of 1.


On Thursday, July 20, 2017 at 11:00:13 AM UTC-4, David Ortiz-Grob wrote:
On Thu, Jul 20, 2017 at 10:44 AM, Chris Hettinger <christophe...@gmail.com> wrote:
Why not drive 10 SPDT relays off the same arduino pin (have to verify that arduino pin can source enough current for all 10 relay drivers). What kind of latency can be allowed?  The relays will not all "turn on" or "turn off" at the same time in this configuration because of mechanical/ electrical differences in the relay/  driver circuit, but the latency will be very low.

Here is a 16 relay board with integraed drivers:
It uses a ULN2803APG, which has a 2.7kohm resistor on each input.  Driving them with 5 volt logic (Arduino Uno) yields 1.851mA (1.85ma=5V/2700ohm).  The Arduino can source 40ma (https://playground.arduino.cc/Main/ArduinoPinCurrentLimitations) well below 10x1.851ma=18.52ma.

Chris

On Thu, Jul 20, 2017 at 10:22 AM, Ryan Ransford <rdra...@gmail.com> wrote:
This is by no means my forte, but a quick google search for multi-relay shows that these sorts of things do exist.

http://www.instructables.com/id/Home-Automation-How-to-Add-Relays-to-Arduino/ -- This article shows an arduino-driven 8-relay board.
On Thu, Jul 20, 2017 at 10:14 AM, McCarthy, Patrick (GE Appliances, Non-GE) <patrick....@geappliances.com> wrote:

So, I need to switch an incoming line to 1 of 2 outputs… Easy, SPDT

But…

I have 10 incoming lines…. And they all need to move together

I found a big barrel style (5” deep!)that cost 120.00 each, Min order 10.

 

Does anyone have a better/cleaner/cheaper solution?

 

-Mixed inputs, some 5v, some 120v

-All outputs (20) are isolated from each other

-The switch needs to happen in 1 step, while under power (10 toggles != a good solution, even with a bar epoxied across all 10 (Yes, tried… Mechanically unsound…))

-Not fond of Breadboard solutions where I am, so “10 relays with a common switching signal” is a no-go[Unless you have something that has that all preinstalled on a card]

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David Ortiz-Grob

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Jul 20, 2017, 11:05:57 AM7/20/17
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On Thu, Jul 20, 2017 at 11:00 AM, David Ortiz-Grob <david.or...@gmail.com> wrote:

David Ortiz-Grob

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Jul 20, 2017, 11:12:13 AM7/20/17
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There may yet be hope? http://www.ckswitches.com/search-distributor-stock/?mode=3&partnum1=F10UEE

If you really don't like the relay solution, 3 mechanically linked 4PDT is probably workable

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2600

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Jul 20, 2017, 11:54:46 PM7/20/17
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Don't know the parameters for your "signals". If the max-to-min voltage excursion is small, a CMOS analog multiplexer circuit would work without moving parts or the need to drive high-current relay coils.

Zero-to-5 Volt signal range would allow use of the 74HC153. Has two four-to-one 'selectors' that pass an analog signal when selected. Would take one-and-a-half of these to select ten inputs. The older "CD4000" series CMOS devices allowed up to a 15-Volt signal range, so long as the supply voltage was higher than the max signal amplitude. That series is old, but listed a dual four-to-one and a single eight-to-one part.  All of them have a finite "on" resistance. The "off" side is megohms. So the current max of your signal becomes important using these. 

And if you're switching a signal that's AC, a metal-to-metal relay contact is the only simple solution.

73

Brian Kopke

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Jul 23, 2017, 4:14:06 PM7/23/17
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Andy McConnell

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Aug 1, 2017, 1:08:25 AM8/1/17
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Anyone got an old "A / B" box for switching detail or parallel printers?
Sounds like it would have just the type of switch inside you need.
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